rtcds improvements

Several minor improvements to rtcds

• fixes restart --all, closes #319 (closed)
• root build and install not allowed (breaks file permissions). closes #312 (closed)
• rtcds start ... will now start other models if model1 already started. Closes #276 (closed)
• lowercase model names enforced on most commands. closes #234 (closed)
• setting START_DELAY environment variable speeds up model starts on systems that don't need much delay, such as the sites.

support/bin/rtcds.in

@@ -341,11 +341,18 @@ stop_sys() {
 	local unit_name=`get_model_unit ${sys}`
 	sudo systemctl stop $unit_name
 
+	timeout=0
 	md=waiting
 	while [ -n "${md}" ]
 	do
 	  sleep 1
 	  md=$(lsmod | grep "^${sys}\s") || true
+	  let "timeout=timeout+1"
+	  if [ $timeout -ge 120 ]
+	  then
+	    log "Timed out waiting for ${sys} to stop"
+	    exit 4
+	  fi
 	done
     done
 }